U.S. patent number 8,256,926 [Application Number 12/485,932] was granted by the patent office on 2012-09-04 for illumination device.
This patent grant is currently assigned to Hon Hai Precision Industry Co., Ltd.. Invention is credited to Sei-Ping Louh.
United States Patent |
8,256,926 |
Louh |
September 4, 2012 |
Illumination device
Abstract
An illumination device includes a lampshade, a heat dissipation
module, a light module and a lamp cap. The lampshade includes a
shell and an optical lens fixed on the shell. The heat dissipation
module includes a plurality of heat sinks, a bottom plate coupled
to the heat sinks, and a cavity defined in the center of the heat
dissipation module. The light module is received in the cavity and
toward the optical lens, including a substrate and a light source
mounted on the substrate. The lamp cap is coupled to the heat
dissipation module and away from the optical lens.
Inventors: |
Louh; Sei-Ping (Tu-Cheng,
TW) |
Assignee: |
Hon Hai Precision Industry Co.,
Ltd. (Tu-Cheng, New Taipei, TW)
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Family
ID: |
41447161 |
Appl.
No.: |
12/485,932 |
Filed: |
June 17, 2009 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20090323331 A1 |
Dec 31, 2009 |
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Foreign Application Priority Data
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Jun 30, 2008 [CN] |
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2008 1 0302451 |
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Current U.S.
Class: |
362/294; 362/800;
362/311.02; 362/249.02; 362/373 |
Current CPC
Class: |
F21K
9/23 (20160801); F21V 29/773 (20150115); F21V
29/83 (20150115); F21V 29/70 (20150115); F21V
29/89 (20150115); F21V 29/506 (20150115); F21Y
2115/10 (20160801) |
Current International
Class: |
F21V
29/00 (20060101) |
Field of
Search: |
;362/249.02,294,373,311.02,800 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2713301 |
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Jul 2005 |
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CN |
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2938416 |
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Aug 2007 |
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CN |
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Primary Examiner: Han; Jason Moon
Assistant Examiner: Apenteng; Jessica M
Attorney, Agent or Firm: Altis Law Group, Inc.
Claims
What is claimed is:
1. An illumination device, comprising: a lampshade comprising a
shell and an optical lens fixed on the shell, wherein the shell
defines a plurality of first through holes surrounding the optical
lens; a heat dissipation module comprising a hollow tube with a
cavity extending therethrough, a plurality of heat sinks extending
outwardly and radially from an outer surface of the tube, a bottom
plate coupled to and sealing a bottom of the hollow tube, the
lampshade being coupled to and sealing a top of the hollow tube,
the first through holes of the lampshade being located over and
communicating with the cavity of the hollow tube, wherein a part of
the heat dissipation module is received in the lampshade, wherein
the bottom plate defines a plurality of second through holes
corresponding to and aligned with the first through holes; a light
module received in the cavity of the hollow tube of the heat
dissipation module and arranged between and spaced from the bottom
plate and toward the optical lens, comprising a substrate and a
light source mounted on the substrate and facing toward the optical
lens, the substrate defining a plurality of third through holes in
alignment with and communicating with the first through holes and
the second through holes; and a lamp cap coupled to the heat
dissipation module and away from the optical lens.
2. The illumination device of claim 1, wherein the heat dissipation
module comprises aluminum, copper, or aluminum and copper
alloys.
3. The illumination device of claim 1, wherein the third through
holes surround the light source.
4. The illumination device of claim 1, wherein the light source is
a light-emitting diode (LED) chip, LED, or LED module.
5. The illumination device of claim 1, wherein the light source
comprises a plurality of LED chips, a plurality of LEDs, or a
plurality of LED modules.
6. An illumination device, comprising: a lampshade comprising a
shell and an optical lens fixed on the shell, wherein the shell
defines a plurality of first through holes surrounding the optical
lens; a heat dissipation module comprising a hollow tube at a
center thereof and a plurality of heat sinks with top ends thereof
coupled to the shell, the heat sinks extending outwardly and
radially from an outer surface of the tube, the first through holes
being located over and communicating with an interior of the hollow
tube, a bottom plate coupled to a bottom of the hollow tube, the
bottom plate defining a plurality of second through holes in
alignment with the first through holes; and a light module received
in the hollow tube and comprising a substrate fixed to the hollow
tube and spaced from the bottom plate and lampshade and a light
source mounted on the substrate and towards the optical lens, the
substrate defining a plurality of third through holes in alignment
with and communicating with the first through holes and the second
through holes.
7. The illumination device of claim 6, wherein the third through
holes surround the light source.
Description
BACKGROUND
1. Technical Field
The present disclosure relates to illumination devices, and
particularly, to a light-emitting diode (LED) illumination
device.
2. Description of Related Art
LED lamps generally have a higher light intensity than fluorescent
lamps, where a plurality of LEDs are often arranged into crowded
groups. Thus, heat generated by the plurality of LEDs concentrate,
and create uneven heat distribution over an LCD board. Thus, the
LCD board is not able to dissipate the locally-concentrated and
unevenly-distributed heat quickly and efficiently. Such
accumulation may cause the LEDs to overheat and to experience
unstable operation or even malfunction.
Therefore, an illumination device is desired to overcome the
limitations described.
BRIEF DESCRIPTION OF THE DRAWINGS
Many aspects of an illumination device can be better understood
with reference to the following drawings. The components in the
drawings are not necessarily drawn to scale, the emphasis instead
being placed upon clearly illustrating the principles of the
present apparatus for assembling a machine tool. Moreover, in the
drawings, like reference numerals designate corresponding parts
throughout the several views.
FIG. 1 is an assembled, isometric view of an exemplary illumination
device.
FIG. 2 is an exploded view of FIG. 1.
FIG. 3 is a cross section of the illumination device of FIG. 1,
taken along line III-III thereof.
DETAILED DESCRIPTION
Referring to FIGS. 1-3, an illumination device 200 in accordance
with one embodiment of the present disclosure is used in
environments requiring high lighting intensity, such as indoor
lighting, gymnasiums, courtyards, streets, and others.
The illumination device 200 includes a lampshade 10, a heat
dissipation module 20, a light module 30, and a lamp cap 40. The
lampshade 10 includes a shell 101 and an optical lens 102 fixed on
the shell 101. The shell 101 includes a plurality of first through
holes 103. The first through holes 103 are defined in the shell 101
surrounding and positioned close to the optical lens 102.
The heat dissipation module 20 is integrally made of metal with a
good heat conductivity, such as aluminum, copper, and alloys
thereof. A part of the heat dissipation module 20 is received in
the lampshade 10. The heat dissipation module 20 includes a
plurality of heat sinks 201, a bottom plate 203 connected to the
heat sinks 201, and a cavity 202 defined in the center of the heat
dissipation module 20. The heat sinks 201 extend outwardly and
radially from an outer circumferential surface of the cavity 202.
The bottom plate 203 is fixed on one side of the cavity 202 and
away from the optical lens 102. The bottom plate 203 defines a
plurality of second through holes 204 corresponding to the first
through holes 103 of the shell 101.
The light module 30 is received in the cavity 202 and toward the
optical lens 102. The light module 30 includes a substrate 301 and
a light source 302 mounted on the substrate 301. While in the
illustrated embodiment, light source 302 is shown as a LED chip, it
will be appreciated that a plurality of LED chips, a plurality of
LEDs, or a plurality of LED modules will be equally applicable and
remain well within the scope of the disclosure. The substrate 301
defines a plurality of third through holes 303 corresponding to the
first through holes 103 and the second through holes 204. The third
through holes 303 are surrounding and positioned near the light
source 302.
The lamp cap 40 connects to the heat dissipation module 20. Here,
lamp cap 40 is fixed on the bottom plate 203 of the heat
dissipation module 20 and away from the optical lens 102. The lamp
cap 40 is integrally metal with good heat conductivity, such as
aluminum, copper and alloys thereof. Light emitted from the light
source 302 passes through the optical lens 102. Thus, the light
module 30 can generate light over a large-scale illumination
area.
In use, when the light module 30 is activated to illuminate. Heat
generated by the light source 302 is conducted to the heat
dissipation module 20 via the substrate 301. The heat accumulated
in the substrate 301 is quickly and substantially transferred to
the heat sinks 201 for dissipation into the ambient air, and the
second through holes 204 of the heat dissipation module 20
corresponding to the first through holes 103 and the third through
holes 303 dissipate the heat by natural convection, thus avoiding
local concentrations and uneven distribution of the heat occurring
on the heat dissipation module 20. Therefore, the heat generated by
the light source 302 can be dissipated to the ambient air via the
heat sink 201, the first through holes 103, the second through
holes 204, and the third through holes 303 sufficiently and
rapidly; accordingly, the light source 302 can be maintained within
its predetermined temperature range when operating.
While the invention has been described by way of example and in
terms of preferred embodiment, it is to be understood that the
invention is not limited thereto. To the contrary, it is intended
to cover various modifications and similar arrangements (as would
be apparent to those skilled in the art). Therefore, the scope of
the appended claims should be accorded the broadest interpretation
so as to encompass all such modifications and similar
arrangements.
* * * * *